Acoustic stand for telephone-receivers



B. E. CHAPIN.

ACGUSTIC STAND FOR TELEPHONE RECEIVERS. APPLICATION FILED Aue.26. I9I8.

PII'tIaIIIId May 259 19m.

2. SHEETS-SHEET l- B.. E. CHAP1N. ALGUSTiICSTIND FOf TELEPHONE RCE|VER`S`. y APPLICATION LED AUG-26| 1918. 1,341,358.' Patente@ May 25,1920.

UNITED STATES PATENT caricia.

BYRON E. CHAPILXT'V, 0F OKLAHOMA, OKLAHOMA ACOUSTIC STAND FOR TELEPHONE-RECEIVERS.

Specification of Letters Patent.

Patented liliana/25,

Appiieation sied August ze, 191s. sensi No. 251,526.

' listening tube through which the sound vibrations produced by the receiverwill be carried to the ears of the listener and thereby eliminate the necessity for holdinglr the receiver directly against the head.-

' The invention has as a further object` to provide a' stand of suchconstruction that substantially all of the sound waves produced by the receiver will be eominunicated to the ears ot the listener while, at the saine time, extraneous sounds will be shut out of the receiver. i

The' invention has as a still .tui-ther object to provide a construction wherein communication to the stand of sound vibrations emanating from the receiver will be` p revented to accordingly overcome responsive discordant vibrations in the stand.

"And the invention has as a still further object to provide a device which may be readily employed with the receiver of substantially any type of telephone now in coinrnon use.

(lther and incidental objects will'appear 1 during the course of the detailed description of the invention. In the drawings, wherein I have illustrated the preferred embodiment of the invention, and wherein similar refer-' ence characters designate corresponding parts throughout the v:-ieveral views:

Figure l is a perspective view showing the receiver-of a conventionaltype of telephone in position upon 'my improved stand,

- Fig. 2 is a sectional view more particularly illustrating the structural" details oit the stand and the manner in which the stand is toinied to support the telephone receiver, the receiver being illustrated in elevation and partly broken away,`

Fig. 3 is a plan view of the stand having the sound plug `thereof.ieinoved, and,

Fig. l is a perspective View showing the auditory tube plug of the stand in detail, its extraneous sound excluding apron, and the elbow connected with the said plug.

Referring now more particularly to the drawings I have shown my improved stand .in connection with a, conventional type of telephone l0 having a receiver 11. This re ceiver is provided with the usual ear piece 12 having a flared sound opening 13 therein. In carrying 'the invention into eilect employ a stand which is harmed with a rectangular body block T his body block is preferably formed of wood and is supported by` foot knobs 15 connected. thereto in any approved n'ianiier adjacent itscorners, The" knobs l5 are preferably of rubbers() as to prevent the transmission oit' sound vibrations to. the body block from the object upon which the stand is rested. body block is formed with an annular raised portion 16 in which is seated an annular sound insulating and cushioning member Il? This member is preferably in the nature oit a rubber ring and7 is fixed within a suitable Centrally the groove in the upper, face of the raised portion 16, the ring projecting, as particularly shown in Fig.,2, a slight distance above the top: face of the raised portion v ormed through the stand hody 14 cen trally thereof and. axially with respect to the cushioning ineinber 17,' is an opening enlarged throughout the Ina-jor portion ot its length to provide a recess 19 at the lower side of the stand body. Reinovably engaged in said opening is a sound tube or plug QU, shownA in detail in Fig. l of the drawings.

-The plug 2Q is preferably formed of wood so as to eliminate any metallic vibrations therein and the wood of the block is such as to possess good phonetic properties so as to facilitate the transmission oi sound vibrations therethrough. Formed on. the plug is a reduced annular shank 2l 'teru minating in a further reduced nipple. 25%. An annular shoulder 23 is thus formed at theiiiner end of the shank and a similar shoulder 24 at the inner end of the nipple. As particularl shown in Fig. 2 ot the drawings, the shan 2l is snugly received within the opening 18 :torconnecting the plug with thestand body while the shoulder 23 of the plug rests against the upper tace of the stand body Jfor thus supl'rorting the plug te upstand 'from the stand body axially oi the cushioning member i7. The plug is eylin drical, being of adiameter slightly less than the diameter ofthe opening'l in the ear `,piece 12 of the telephone receiverand at ber.

its upper end is formed with a flared sound collecting bowl 25. Forme/d in the plug adjacent its upper end is an annular groove 26 and engaged in this groove is an extraneous sound excluding apron or washer 27. The washer 27 is preferably formed of rubber and is normally fiat.

Snugly fitted over the nipple 22 of the plug 2U within the recess 19 in the stand body, is one end of an elbow 28 abutting the shoulder 24 of the plug shank. This elbow may be formed of hard rubber, ebonite, or the like, and, as will be obvious, will hold the plug 2O against upward displacement. Fitted over the opposite end of said elbow is a flexible listening tube 29. The tube 29 may be formed of rubber and, at its free end, may be equipped with a single ear tube 30, or, it preferred, may vin the well known manner, be equipped with a pair of such tubes. Suitably connected to the lower side of the stand body at one side edge thereof, is a guide strip 31, which, to increase the attractiveness of the device may, as shown in Fig. 1 of the drawings, be in the nature of a grill. This guide strip is, as shown in Fig. 2, formed to snugly receive the listen ing tube 29 therethrough and supports the inner end portion of the said tube with re-v spect to the elbow 28 while, at t-he same time, tending to prevent accidental disengagement ot' the tube from the elbow.

. As will now be seen upon an inspection of Figs. 1 and 2 of the drawings, the cushioning member 17 is of a diameter to ieecive the ear piece 12 so that the telephone receiver may, when the telephone is in use, be rested upon the stand by simply fitting the ear piece over the sound plug 20 to engage at its outer end with the cushioning mem- This cushioning member will, theref fore, act to not only yieldably support the receiver' but, as will be clear, will also provide practically a sealed joint between the stand body and the receiver and will thus insulate the interior ofthe flared opening of the ear piece 12 ot' the receiver with respect to outside sounds.

is shown in Fig. 2, when the receiver is thus rested upon the stand the sound plug 2() will fit snugly' within the opening 13 ot' the ear piece in close spaced relation to the diaphragm ot the receiver. Sound vibrai tions given off by the diaphragm will thus be collected within the bowl 25 of the sound plug and directed thereby through the plug and through the listening tube to the ears of the party 'using the tele )hone At the same time, the apron 27 willfhe engaged by the 'flared face of the sound' opening -in the ear piece '12 and flexed downwardly there by S0 that a' practically sealed joint will'be4 provided between this apron and the said ear piece for eilectually excluding, in addition to the similar function of the cushioning member 17, extraneous sounds from the bowl 25 of the sound plug, as well as stopping the vibrations emanating from the diaphragm of the receiver and directing substantially all of such vibrations through the sound' plug to be carried through the listening tube. I thus provide a highly efficient device for the purpose set forth and a stand of such structural character that practically all of the vibrations given off by the diaphragm of the receiver will be carried to the ears of the party using the telephone while, at the Sametime, foreign interfering sound vibrations will be practically excluded. Should thesound plug of the device become impaired, Ithis plug may, as will be observed,`be easily renewed and similarly, the apron 27 of the plug 'may also be readily renewed when'l found necessary, without the necessity for discarding the plug. The device may thus be readily maintained at its maximum efficiency.

Having thus described the invention, what is claimed as new is 1. An acoustic stand for telephone receivers including a stand body, a sound plug provided with a reduced inner end portion defining a shoulder upon theplug, said reduced inner end portion ofthe plug being fitted through the stand body to engage said shoulder therewith for supporting the plug upon the body, and means connected with the reduced inner end portion of the plug at the lower side of the body and holding the plug against upward displacement, the bodybeing adapted to support a telephone receiver rested thereon to fit over the sound plug.

42. An acoustic stand for 'telephone receivers including a stand body, a sound tube upstanding therefrom and formed in its periphery with agroove, and an annular flexible sound excluding apron fitting around the tubeand engaged in said groove, fthe apron being adapted to contact at its free marginwvith the wall of the sound opening of tlie `ear piece of. a telephone receiver rested upon the standover the sound tube.

3. 4An-` acoustic stand for telephone receivers .including astand body, a sound tube upstafnding therefrom, and a flexible sound excluding apron 'removably fitted upon the tube to be supported'therebyabove the body, the apronr` being adapted to contact at its free margin with the wall of the sound opening of the ear piece of a telephone receiver rested upon the stand over the tube.

ln testimony whereof l affix my signature.

BYRON E. CHAPIN. fr.. s] 

